The Study on Addition of Nutrient Pillar of Nitrogen, Phosphorus, Potassium (N:P:K) and Organic Materials in Organic Fertilizer Which is Decomposed by Using Earthworms (Pheretima peguana)

J. Kurukodt, P. Jitto, S. Passago and S. Vongtanaboon

Environmental Research Journal 5 ( 3 ): 93 - 96 , 2011